Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
- Triple validation: technical, pedagogical, sectoral.
- Minimum rating 4.8/5 over the last 12 sessions.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
1 seat held for the next session
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.

To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.
Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.
Don't let this gap widen
Without this training, your Ruby scripts remain slow and buggy, wasting 20-30% of development time on basic errors like unhandled exceptions or poorly optimized Hashes.
Imagine losing DevOps contracts due to poorly integrated gems, or your apps crashing in production in front of unhappy clients, costing up to 5000€ per incident according to Stack Overflow studies.
Juniors stagnate without mastering procs, multiplying bugs by 3, while Ruby on Rails competitors mock your untested code.
Invest 14h to avoid these pitfalls, boost your CV, and gain 15-25% immediate performance.
Dive into advanced Hashes and Sets to handle complex data fluently, explore blocks and procs to create powerful iterators, complete practical exercises on system task automation, produce optimized tested scripts live, adopt Ruby idioms for idiomatic and maintainable code that boosts your productivity from day one.
Install and manage gems via Bundler to supercharge your projects, code automated tests with RSpec on real API cases, optimize profiling for 30% faster apps, assemble a complete Ruby application responding to a real client brief, receive expert feedback on your deliverables, leave with a concrete portfolio ready to impress recruiters.
The Intermediate Ruby Training - Develop Robust and Optimized Apps program is delivered onsite or remote (blended-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.
The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.
For the smooth delivery of the Intermediate Ruby Training - Develop Robust and Optimized Apps program, the following equipment is required:
For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.
Assessment of skills acquired during the Intermediate Ruby Training - Develop Robust and Optimized Apps program is performed through:
Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.
Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.
Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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JavaScript DevelopmentIndustry-certifiedAvailable on-site and remotely. Pick your city to see the local training center.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.